Cat Dental Formula: 26 Baby Teeth, 30 Adult, 3-6 Months

A cat carries 30 permanent teeth in a jaw roughly 5 cm long, and it grows 26 baby teeth first, replacing them between 3 and 6 months of age. Those two counts — 26 and 30 — explain most of what owners see: a 4-month-old dropping tiny teeth on the rug, a double canine at 6 months, and the sudden bad breath that starts when the adult set finishes arriving around 7 months.

The adult formula: 30 teeth, 15 per side

The permanent dentition is written I3/3 C1/1 P3/2 M1/1 on each side. Decoded: 3 incisors top and bottom, 1 canine top and bottom, 3 premolars above and 2 below, and 1 molar above and 1 below, for 8 teeth on each upper side and 7 on each lower side. That gives 12 incisors, 4 canines, 10 premolars, and 4 molars, totaling 30. Dogs have 42. The 12 missing teeth are all premolars and molars, which is the single clearest statement of what a cat is: a shearing machine, not a grinder. Jaw length tracks body size across breeds, which the breed quiz makes easy to compare.

Tooth type	Deciduous	Permanent	Erupts (months)	Root closed (months)
Incisors	12	12	2 to 4 weeks, then 3 to 4	7 to 8
Canines	4	4	3 to 4 weeks, then 4 to 5	9 to 10
Premolars	10	10	4 to 6 weeks, then 4 to 6	9 to 12
Molars	0	4	4 to 5	10 to 12
Total	26	30	all in by 6 to 7	12

Why the baby set stops at 26

Cats have no deciduous molars, so the first set skips the 4 teeth at the back of the jaw. The 26 are 12 incisors, 4 canines, and 10 premolars — the same front-to-middle lineup as the adult mouth, only smaller and whiter, with a visible neck where the crown meets the gum. A kitten at 5 weeks with 26 teeth can already shear meat. The 4 molars erupt directly as permanent teeth at 4 to 5 months, which is why a 5-month-old can seem to gain a whole new back row in 3 weeks.

The 3 to 6 month swap

Order matters more than dates. Incisors come first, around 3 to 4 months; canines follow at 4 to 5 months; premolars and molars fill in between 4 and 6 months. By 6 months most cats have 30 teeth; by 7 the last roots are closing. During this window expect 3 things: pink-tinged saliva for a few days, a temporary drop in appetite for 24 to 48 hours, and a strong urge to chew cardboard, rope, and fingers. Offer chilled rubber toys and soften food for 2 to 3 days if eating slows, but do not switch to all-wet permanently, because chewing texture is part of how the jaw and gums develop. Weigh the kitten every 2 weeks through the window; a gain of 100 g per week is the usual target, and a stall across 2 checks means the mouth needs a look, not a new food.

The double canine is the one to catch

If a permanent canine erupts before the baby tooth falls, both sit side by side in a 5 mm space. That crowding traps food, pushes the adult tooth forward, and by 8 months can leave a misaligned bite that rubs the palate. Retained deciduous canines are the most common dental anomaly in cats, and the fix is extraction under sedation, ideally at the 6-month check, not at 2 years. Premolar retention happens too and is easier to miss because the teeth are smaller. Count teeth at 6 months: 30 is right, 32 means 2 retained, 28 means 2 missing or unerupted.

What 30 teeth are built to do

The canines show 1.5 to 2 cm of curved crown above the gum and carry a root roughly twice that long, built for a killing bite that lands between 2 neck vertebrae and severs the cord. The upper fourth premolar and lower first molar form the carnassial pair, scissor blades that slide past each other to shear muscle into pieces small enough to swallow whole. Cats do not chew laterally; there is no flat occlusal table, and the jaw hinge sits in a deep fossa that allows almost no side-to-side motion. This is why a cat with 4 fewer teeth on one side can still eat dry food, and why dental pain shows up as dropping food, not as refusing it. The mouth is also a sense organ: the 4 canines sit inside a field of touch hairs, and whisker function explains how a cat aims a bite in the dark. Two ducts behind the upper incisors also lead to the vomeronasal organ, so a cat can taste a scent before it commits the canines; that path is traced in the vomeronasal organ.

Cleaning a 30-tooth mouth in 90 seconds

Use a finger brush or a 1 cm strip of gauze with pet enzymatic paste, and work in a fixed order: 4 canines first, then the back premolars on both sides, 10 to 15 seconds per zone. Skip the incisors on night one. Most cats accept 30 seconds on day 1 and 90 seconds by day 14 if you stop before they pull away. Toothbrushing every 48 hours is the minimum that keeps plaque from hardening; daily is better. Dental chews and water additives help at the margins but do not replace the brush on the outer surface of the upper fourth premolar, where tartar starts first. Book a professional scaling and polish every 6 to 12 months once tartar is visible at the gumline, and ask for full-mouth radiographs at that visit; roughly 1 in 3 cats over 5 years has resorption lesions that only show on film.

Red lines for a 30-tooth mouth

Book a dental exam, not a waiting week, for: drooling that soaks the chin, eating on one side or dropping kibble, bleeding at the gumline when you brush, a broken canine with a pink or black dot in the center (that is exposed pulp), facial swelling under one eye, or weight loss over 8 weeks with normal appetite. Cats hide oral pain well, and a mouth that hurts is often a mouth with resorption lesions or periodontal pockets 4 mm deep or more, which need radiographs under anesthesia, not a course of antibiotics. One more check that costs nothing: lift the lip on both sides once a week. The gumline should be salmon pink; a red margin 1 to 2 mm wide is gingivitis at the stage where 14 days of brushing still reverses it.

Terms mentioned in this article

Frequently asked

How many teeth should an adult cat have?

Thirty: 12 incisors, 4 canines, 10 premolars, and 4 molars. Count at the 6-month check, when the full set should be in. Thirty-two usually means 2 retained baby teeth, and 28 means 2 teeth are missing or still under the gum, which is worth a radiograph rather than a guess.

Is it normal for a kitten to lose teeth at 4 months?

Yes, that is the start of the swap. Incisors loosen around 3 to 4 months, canines at 4 to 5, and the back teeth follow, with all 30 permanent teeth in by 6 to 7 months. Expect pink saliva for a few days and a 24 to 48 hour dip in appetite, and offer chilled chew toys during the window.

What if the baby canine never falls out?

Then both teeth share a 5 mm space, which traps food and pushes the adult tooth forward. Retained canines are the most common dental anomaly in cats, and the usual fix is extraction under sedation at the 6-month check. Waiting until 2 years often means a misaligned bite that rubs the palate and needs more work.